J2SE5.0 Static Import of New Features
晁 晁 攀 Smallnest@163.com
Before J2SE5.0, if you need to use other classes, such as the method in java.lang.math, you need to write the following code:
Double value = math.log (100) * math.pi;
Now you only need to import static, then you can use static methods and static fields directly in your code:
Import static java.lang.math. *;
...
Double value = log (100) * pi;
Look at a detailed example. We first build a class containing a static method and a static field:
Package com.kuaff.jdk5; public class staticclass {public static string label = "Ancient Chinese Sword"; public static void printlist () {string [] swords = new string [] {"Xuanyuan Xia Sword", "Zhan", "Chiao", "Tai A", "Long Yuan", "Dry will", "Mo Xie", "Fish Intestines", "Pure", "In (String Name: Swords) {System.out .printf ("% s% n", name);}}}
Newly built a class, static imported the fields and methods, and use them:
Package com.kuaff.jdk5; import static com.kuaff.jdk5.staticclass. *; // Static Import Public Class StaticimportShow {PUBLIC VOID TESTSI () {System.out.Printf ("% s:% n", label); PRINTLIST (); public static void main (string [] args) {staticimportshow show = new staticimportshow (); show.testsi ();}}
